File:Thescelosaurus forelimb motion.jpg
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Summary
| Description | Right pectoral girdle and forelimb bones of Thescelosaurus sp. (NCSM 15728) and motion at the shoulder. A. Right scapulocoracoid in lateral view. B-D. Humerus in lateral (B), posterior (C), and anterior (D) views, with broken white line indicating edge of humeral head. E-F. Radius and ulna in proximal (E) and medial (F) views. G. Motion at the shoulder in lateral view. H. Transverse motion at the shoulder in anterior view. I-J, Skeletons of Thescelosaurus sp. NCSM 15728 (I) and CMN 8537 (J), showing that the curvature of the anterior dorsal vertebrae positions the forelimb such that it can reach the ground when the sacrum is horizontal. K, Tracing of several of the bones of CMN 8537 (vertebral centra, femur, tibia + fibula + proximal tarsals, metatarsus + distal tarsal, scapulocoracoid, humerus, radius + ulna, and carpus + metacarpus), with corrections of the dislocations at the hip and posterior dorsum in the preserved skeleton, and with heavy lines representing the long axis of the sacrum and the surface of the ground, showing that the forelimb can reach the ground and can also be retracted to avoid the ground during bipedal locomotion. L, Fleshed-out reconstruction of Thescelosaurus sp. posed as in K. 1-3, positions 1-3 (see Materials and Methods for description), c, coracoid; ca, carpals; g, glenoid cavity; h, humerus; hh, humeral head; r, radius; s, scapula; u, ulna. |
| Date | |
| Source | https://palaeo-electronica.org/content/2023/3978-forelimb-function |
| Author | Leandra Walters, published by Philip J. Senter and Jared J. Mackey |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:08, 26 October 2024 | | 800 × 1,067 (149 KB) | FunkMonk | {{Information |Description=Right pectoral girdle and forelimb bones of Thescelosaurus sp. (NCSM 15728) and motion at the shoulder. A. Right scapulocoracoid in lateral view. B-D. Humerus in lateral (B), posterior (C), and anterior (D) views, with broken white line indicating edge of humeral head. E-F. Radius and ulna in proximal (E) and medial (F) views. G. Motion at the shoulder in lateral view. H. Transverse motion at the shoulder in anterior view. I-J, Skeletons of Thescelosaurus sp. NCSM 1... |
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